Abstract
A new monogenetic trematode Allomicrocotyla niger is described here from the gills of the fish Parastromateus niger (Stromateidae)
of Karachi coast. The species is characterized by having fusiform to elliptical body, paired oral suckers. Pharynx is pyriform. Testes
26 in number, postovarian, irregularly arranged. Ovary Y-shaped, uterus elongated and vagina is funnel-shaped. Haptor asymmetrical,
fan fringed-shaped. Clamps 47 in number, equal in size.
